CD74LPT16543ASM

Overview

The CD74LPT16543ASM is a high-speed CMOS logic device manufactured by Harris Corporation, functioning as an octal bus transceiver with 3-state outputs. It features low-power Schottky TTL (LSTTL) compatible inputs and outputs, ensuring reliable interfacing with standard digital systems. The component operates within a supply voltage range of 2.0V to 3.6V, providing robust performance in low-voltage applications. It includes directional control and output enable functions to manage data flow effectively across the bus.

Feature Summary

• Octal bus transceiver architecture for efficient data transfer
• Low-power Schottky TTL compatibility for broad system integration
• Three-state outputs to prevent bus contention

Applications

• Memory mapping in microprocessor systems
• I/O port expansion for digital controllers
• Bus isolation in communication interfaces

Procurement Notes

Verify the manufacturer marking matches Harris Corporation specifications. Confirm the package type is SOIC-24 and check for any specific ordering suffixes that may indicate temperature range or tape-and-reel packaging. Ensure the part number aligns with current datasheet revisions to avoid obsolete variants.

Selection Notes

Select this component when designing systems requiring bidirectional data transfer between buses operating at different voltage levels. Its LSTTL compatibility makes it suitable for legacy system upgrades. Consider power consumption requirements and signal integrity needs when choosing between similar bus transceivers.

Part Context

This device belongs to the LPT series of logic components, designed for high-speed operation with low power dissipation. It complements other bus interface devices in complex digital circuits, providing essential functionality for data routing and isolation in embedded systems and industrial control applications.

Replacement Considerations

Check for direct pin-compatible substitutes from manufacturers like Texas Instruments or National Semiconductor. Verify electrical characteristics such as propagation delay and drive strength match original design requirements before substitution.